Use the discriminant to determine whether the quadratic equation has two unequal real solutions, a repeated real solution, or no real solution without solving the equation.x2 + 6x + 8 = 0

A. no real solution
B. two unequal real solutions
C. repeated real solution


Answer: B

Mathematics

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Find the probability.In one city, the probability that a person will pass his or her driving test on the first attempt is 0.61. 11 people are selected at random from among those taking their driving test for the first time. What is the probability that among these 11 people, the number passing the test is between 2 and 4 inclusive?

A. 0.0670 B. 0.0870 C. 0.0965 D. 0.0827

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Find the exact area of the surface obtained by rotating the given curve about the x-axis.

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Simplify the rational expression. If the rational expression cannot be simplified, so state. 

A. cannot be simplified
B. -1
C. - 
D. 1

Mathematics

Factor the binomial completely.49a3 - 64a

A. (7a2 + 8)(7a - 8)  B. a(49a + 1)(a - 64)  C. a(7a - 8)2 D. a(7a + 8)(7a - 8) 

Mathematics